Hydrogen and solar

Here's a comment I made for another blog, but I wanted it here so I have the links:

I have speculated for some time that using some capacity of solar thermal to split water into hydrogen might be helpful (although I gather it's not efficient to then use the hydrogen to heat the salts on a cloudy day.)  I see just now that a new technique is proposed for hydrogen production using solar thermal.  Unfortunately, moving hydrogen around is not so easy, I think, but using it in house scale fuel cells might be one way of helping with intermittent direct supply from the grid.